<%@page import="ChartDirector.*, java.util.*" %>
<%
// Use random table to generate a random series. The random table is set to 1 col x 51 rows, with 9
// as the seed
RanTable rantable = new RanTable(9, 1, 51);

// Set the 1st column to start from 100, with changes between rows from -5 to +5
rantable.setCol(0, 100, -5, 5);

// Get the 1st column of the random table as the data set
double[] data = rantable.getCol(0);

// Create a XYChart object of size 600 x 300 pixels
XYChart c = new XYChart(600, 300);

// Set the plotarea at (50, 35) and of size 500 x 240 pixels. Enable both the horizontal and
// vertical grids by setting their colors to grey (0xc0c0c0)
c.setPlotArea(50, 35, 500, 240).setGridColor(0xc0c0c0, 0xc0c0c0);

// Add a title to the chart using 18 point Times Bold Itatic font.
c.addTitle("LOWESS Generic Curve Fitting Algorithm", "Times New Roman Bold Italic", 18);

// Set the y axis line width to 3 pixels
c.yAxis().setWidth(3);

// Add a title to the x axis using 12pt Arial Bold Italic font
c.xAxis().setTitle("Server Load (TPS)", "Arial Bold Italic", 12);

// Set the x axis line width to 3 pixels
c.xAxis().setWidth(3);

// Set the x axis scale from 0 - 50, with major tick every 5 units and minor tick every 1 unit
c.xAxis().setLinearScale(0, 50, 5, 1);

// Add a blue layer to the chart
LineLayer layer = c.addLineLayer2();

// Add a red (0x80ff0000) data set to the chart with square symbols
layer.addDataSet(data, 0x80ff0000).setDataSymbol(Chart.SquareSymbol);

// Set the line width to 2 pixels
layer.setLineWidth(2);

// Use lowess for curve fitting, and plot the fitted data using a spline layer with line width set
// to 3 pixels
c.addSplineLayer(new ArrayMath(data).lowess().result(), 0x0000ff).setLineWidth(3);

// Set zero affinity to 0 to make sure the line is displayed in the most detail scale
c.yAxis().setAutoScale(0, 0, 0);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "", "title='({x}, {value|2})'"));
%>
<!DOCTYPE html>
<html>
<head>
    <title>General Curve Fitting</title>
    <!-- Include ChartDirector Javascript Library to support chart interactions -->
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        General Curve Fitting
    </div>
    <hr style="border:solid 1px #000080; background:#000080" />
    <div style="font:10pt verdana; margin-bottom:1.5em">
        <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
    </div>
    <!-- ****** Here is the chart image ****** -->
    <%= viewer.renderHTML(response) %>
</body>
</html>
